13
Foilsithe 1989
Full text available from Earth, Atmospheric & Aquatic Science Database: 01/01/1998 to present
Leictreonach Sraithchlár
15
Foilsithe 2016
Leabhar
16
le Fischer P., Doris
Foilsithe 1985
Leabhar
17
le Strand, Kenneth A., comp.
Foilsithe 1969
Leabhar